Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 849:
1919, black monogram error surcharge 50r on 5r dark blue, green and light blue, paired with a common 100r on 5r, two perforated singles, full OG, NH, VF, error stamp with Cyrillic ”Z.U.” (Zakhary Umikov) hs is not listed in the Artar Cat., Est. $150-$200, Sc. #158, 160
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